Typewriter for justifying lines



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" ATTORNEYS Patented Aug. 20, 1946 UNITED STATES PATENT OFFICE TYPEWRTERFR JUSTIFYIN G LINES Charles W. Norton, West Orange,y N. J., assigner toRalph 0. Coxhead Corporation, New York, N. Y., a corporation of DelawareApplication July 8, 1944, Serial No. 543,981

12 Claims. l

This invention relates to typewriting machines and as illustrated anddescribed is embodied in a machine known in the art as a Varityllik inwhich a supporting wheel carries interchangeable type shuttles, so thatvarious styles `'and sizes of type may be used at will.

Machines according to this invention are ca-k pable of producing typedsheets in simulation of ordinary printed matter which may be used asmake ready for reproduction by photolithographic or other printingprocesses. The printing type, however, must be given variousconventional dimensions as to Width, and lit is desirable that differentstyles and sizes of type, such as occurs in ordinary printed matter inthe way of headings, emphasis and the like, may be used. Means yforattaining this result is disclosed in my Patent No. 2,298,805, issuedOctober 13, 1942.

The invention as disclosed herein is capable of producing a typed sheetin characters o'f conventional dimensions diiierentially spaced in manydiiierent fonts of type; to accomplish this result requires newstructures in respect of some of the functions, and a novel coordinationo'f the diiierent mechanisms and devices which must be conjcintlyemployed; and it provides mechanism whereby the carriage feed may beadvanced ac`` cording to the varying width of the different characters,and at the same time alfords means for justiiication of the lines touniform length.

The combination involves the utilization of a paper carriage of sufcientwidth to permit the use of a relatively Wide sheet of paper. In typing,an uneven or unjustiiied line is written in a column on the left of thepaper, and a justied line is then written in a column on the right,after operation of a tabulator key. When the end of an unjustified lineis being approached,

the machine rings a bell, or establishes some other signal, and theoperator may then type a few more characters before the ultimate limitis reached. This signal is the margin signal of the ordinary typewriter.The operator having finished writing the unjustified line depresses atabulator key which automatically releases the carriage so that it maymove to the left-hand margin of a new or second column at the right of.the sheet of paper, and the operator then writes the same line over invthis second column, and the machine automatically justies this rewrittenline so that it occupies a standard length. This result is obtained bythe automatic action of the machine.

An object of the invention is to improve and adapt justifying mechanismto a platen carriage control which aords advance of the carriage rinaccordance with the different widths of the typed characters.

Another object of the invention is to provide means whereby diierentstyles of type may be usedin which the characters. do not have the samerelative Widths in the 'different styles.

It is a further object of the invention to provide mechanism for thepurpose stated that is adapted to the use of several diierent sizes oftype. It is also an object of the invention to insure that the platencarriage advance cannot begin until the printing impression has beencompleted.

Another object of the invention is to provide a mechanism of the kindwhich is both simple and automatic, so that it may be used by any typistwithout special training or skill in its operation.

Another object of the invention is to provide improved back-spacingmechanism whereby the carriage may be back-spaced different distancesper stroke.

Further objects and advantages will become apparent in the descriptionof the invention, taken in connection With the accompanying drawingscomprising .a part of` this specication and in which like parts aredesignated by like characters.

Fig. 1 is a plan View Yof one form of `machine embodying the presentinvention",v and showing a paper strip ribbon feed.

Fig. 2 is a plan View of a preferred form of typewriting machine withsuch parts omitted as are well known in the art and may not be necessaryto a complete understanding of the present invention, and showing afabric ribbon feed.

Fig. 3 is a vertical section on the line 3-13 of Fig. 2.

Fig. 4 is a detail elevational View taken on the line 4 4 of Fig, 2 andillustrates the mechanism controlled by the shift keys for changing theeffect of the type key levers relative to the differential letterspacingmechanism.

Fig. 5 is a planl View with details in section on the line 5-5 of Fig. 4and illustrates thev relation of the key push rods to the universal barsthat control the letter spacing. K

Fig. 6 is a view looking at the end of the escapement shaft from therear of the machine and shows the escapement wheel I-f which permits thecarriage to escape one unit. The e'scapement dogs are shown in normal'position when the carriage is stationary.

Fig. '7 is a detailed view of the'escapementdog

